Originally Posted by pvaudio
Lakers said it perfectly: the Eagnas clamps are not built to the same quality standards as other companies' clamps. One of my Eagnas clamps worked flawlessly: buttery smooth action, smooth glide, tight clamping to the turntable. The other clamp needed to constantly be adjusted to keep it gliding and clamping all at the same setting. It would get loose enough to become unlocked even just by holding tension! The parts used to make them are made on a budget, and because of that, you really are shooting in the dark which makes a great point about the equipment: if two clamps are 200 dollars of a 500 dollar machine, then just how cheap is the rest of the equipment, or just how badly are Eagnas gouging you?
I'll try to get a video of the inner workings of the clamps at some point. In the meantime, this sounds like the thread lock on the adjustment screw had dissipated--a simple fix that has little, if anything, to do with quality of construction of the clamp bases.
Also, do you think that Prince and/or Gamma parts are not "made on a budget"? All manufacturing is done with an eye toward cost. Have you ever asked Gamma, Prince or any of the other major manufacturers how much they charge for clamp bases to upgrade one of their machines?